Wash and pat dry the chicken. Separate the skin from the breast meat and arrange the lemon slices on each breast. Mix the salt,oil and pepper and rub it into the chicken. Mix the roughly chopped bacon, garlic and thyme and push into the cavity of chicken. Transfer the chicken to baking pan and bake for 20'. Lower the heat to 200C and bake for 40'. To check if the chicken is done, insert a fine skewer into one of the thighs. If the juices are pink, bake a little longer. Cover the chicken with foil and let rest for 15' before slicing it.